In the process of using gravity casting, it mainly refers to the effective injection process of molten metal into the mold under the action of the gravity of the earth. To some extent, it is also called gravity casting. Gravity casting in broad sense includes sand casting, metal casting, investment casting, EPC, mud casting, etc.; gravity casting in narrow sense mainly refers to metal casting.
In the production of gravity casting, there are many processing methods of products made of metal materials, such as casting, forging, extrusion, rolling, drawing, stamping, cutting, powder metallurgy and so on. Among them, casting is the most basic and commonly used process.
To some extent, gravity casting can effectively inject the molten metal into the hollow mold made of high temperature resistant materials, and the products with expected shape can be obtained after condensation, which is called casting. The product is a casting. Casting can be divided into sand casting and metal casting according to the materials of casting mold. The precision casting factory is adept at both kinds of casting technology, and designs and manufactures these two kinds of casting mould by itself.
Gravity casting can be divided into ferrous casting (including cast iron, cast steel) and non-ferrous casting (including aluminum alloy, copper alloy, zinc alloy, magnesium alloy, etc.) according to the casting materials. Precision casting factory specializes in non-ferrous metal casting, focusing on aluminum alloy and zinc alloy casting.
Narrow sense of gravity casting refers specifically to metal mold casting. Pressure casting is a process in which liquid metal is injected into the mold under the action of other external forces (excluding gravity). The broad sense of pressure casting includes pressure casting and vacuum casting, low pressure casting, centrifugal casting, etc.; the narrow sense of pressure casting refers to the metal mold pressure casting of the pressure casting machine, which is called die casting for short.